| I have two bottom drains that feed 120 liters per minute through my 30 ton pond for 24 hours a day. A friend of mine has a similar setup except that his bottom drain air pump is on a timer and switches off at night. I have not seen any benefits or disadvantages from either approach. My argument is that lots of air is great. His argument is that the Koi need some sleep/quite time and the constant droning of the air does not give it to them. Comments ????? |